Congrats on your acquisition!
If you are definitely going McMillan for your 338, I’d call Darcy Echols and get your name on the list for the next batch of legends.
A legend would be nice. I don't know if he'd do one in edge fill, if that matters. If going really light, I'd opt for the Brown Precision PoundR. I really like the one on my 338. The huge downfall to the PoundR is the cost. OP needs to look at Utah708's thread. There used to be a lot of stocks layed out on that template. It may give the him a better idea of what he wants.